MAGETWO-91570: [2.2.x] - [Github]Can not save attribute #5907

- builds stabilization

Author: rganin

dev/tests/integration/testsuite/Magento/Swatches/Controller/Adminhtml/Product/AttributeTest.php

@@ -174,7 +174,7 @@ public function testLargeOptionsDataSet(
         array $attributeData,
         int $expectedOptionsCount,
         array $expectedLabels
-    ) {
+    ) : void {
         $this->getRequest()->setPostValue($attributeData);
         $this->dispatch('backend/catalog/product_attribute/save');
         $entityTypeId = $this->_objectManager->create(